Background Tuberculosis (TB) is a major global health problem and leading cause of death. Anti-tubercular therapy (ATT) can lead to various adverse effects including cutaneous reactions. Re-challenge remains the only option to restart the safe therapy with limited number of most efficient primary ATT drugs. Objectives To study the demographic profile, identify the spectrum of cutaneous eruptions, offending drug and the reinstitution of safe ATT. Materials and methods This was a retrospective study with inclusion of the indoor patients with cutaneous adverse drug reaction secondary to ATT. Hospital records were analyzed regarding demographic characteristics, type of TB, ATT regimen, pattern of drug rash, offending drugs, laboratory parameters, and reinstitution of ATT after re-challenge. Results All the cases (40 patients) were reported in adults with male to female ratio of 11.2 and mean age of 50 years. Pulmonary TB was the most common type of TB observed in 24 (60%) patients followed by extra-pulmonary in 16 (40%) patients. Maculopapular rash was the most common (42.5%) type of cutaneous eruptions and ethambutol, the most common (45%) offending drug followed by other first line anti-tubercular drugs. Ten (25%) patients developed multiple drug hypersensitivity on re-challenging. Multiple drug hypersensitivity was seen in 10 (25%) patients. Conclusion Drug reaction to ATT is like a double-edged sword as stopping ATT and starting treatment of reaction with systemic steroids can further aggravate the condition with increased risk of disseminated and multidrug resistant tuberculosis. Re-challenge with ATT not only find out the culprit drug but also helps to restart a safer alternate ATT regimen. Limitations Small sample size, lack of proper hospital records due to which some patients were missed and the fact that re-challenge was not performred in mild lichenoid type rash.Background and aims Melanonychia can be a manifestation of benign or malignant pathology and often poses a diagnostic challenge on clinical examination. Even with distinguishing dermoscopic features (nail plate), it can be quite difficult to determine the nature of pigmentation as complete assessment of nail bed and matrix is still not possible. Intraoperative dermoscopy (IOD) can serve as a useful tool to appreciate the bed and matrix changes. The aim here is to study the intraoperative dermoscopic features in patients with melanonychia and correlate with histopathology. Methods 20 consecutive patients with melanonychia were recruited. Inclusion criteria was melanonychia of sudden onset, progressive nature, irregular width/color/symmetry on dermoscopy, positive Hutchinson sign, solitary nail involvement or associated nail dystrophy. Preoperative dermoscopy was performed and recorded. Patients were planned for nail matrix biopsy, during which IOD was performed over nail matrix and bed after removal of the nail plate. Images were recorded and analyzed and correlated with the histopathology. Results Out of 20 patients, 12 were females and 8 males. On IOD-histopathological correlation, 2 patients were found to have melanoma of the nail unit, 5had nail lichen planus, 9 had benign melanocytic nevi, and 4 had fungal melanonychia. IOD revealed fine, parallel and regular lines of pigmentation localized to proximal nail bed and matrix in all patients with benign melanonychia, while dark thick bands with irregular borders, dots, globules, streaks and structureless areas in the two patients with melanoma. Fungal melanonychia revealed an unremarkable nail bed and matrix on IOD. Conclusion Intraoperative dermoscopycan help in determining the nature of melanonychia and obviate the need to perform biopsy in certain cases. It can also aid in delineating the most suitable site for biopsy, along with grossly assessing the extent of involvement in case of malignancy.Background Pityriasis versicolor (PV) is the most common chronic superficial infection of the stratum corneum, reported in 40-60% of the tropical population. After the description of the new Malassezia species, only a few studies have been conducted from India. Aims Molecular identification, quantification of Malassezia species implicated with PV and correlation to its clinical presentation. Materials and methods The subjects include 50 PV patients, who attended the dermatology outpatient department of our hospital and 50 healthy individuals. Same size area of the skin was sampled from lesional and non-lesional sites in the patient group and from forehead, cheek, and chest of healthy individuals. Malassezia spp. isolated were identified by conventional method and confirmed by ITS2 PCR-RFLP and sequencing of D1/D2 region of 26S rDNA. Results Eighty percent of patients presented with hypopigmented lesions and 20% with hyperpigmented lesions. From PV lesions, the most frequently isolated species was M. furfur (50%), followed by M. globosa (27.3%), mixture of M. furfur and M. globosa (15.9%), M. sympodialis (4.5%), and M. slooffiae (2.3%). Higher Malassezia density was found in lesional area as compared to non-lesional area of PV patients and in healthy individuals (P 0.0001). Conclusion Although M. furfur was the most prevalent species isolated from both patients and controls, significantly higher isolation of M. globosa from the lesional area compared to non-lesional area indicates its possible role along with M. furfur in causing PV.Background The association between lichen planus (LP) and cardiovascular disease (CVD) risk factors has been demonstrated in previous reports. However, the evidence of CVD risk factors in Indian patients with LP is limited. Objective To compare CVD risk factors in LP patients and healthy controls. Methods We performed a cross-sectional study on 122 subjects, 61 LP patients, and 61 controls who visited the outpatient clinic of the dermatology department of a tertiary care hospital. Patients with skin diseases known to be associated with CV risk, pregnant, and lactating women were excluded from the study. CVD risk factors were compared between LP cases and controls using anthropometric measures, hemodynamic and metabolic parameters, and inflammatory marker (ESR). https://www.selleckchem.com/products/Paclitaxel(Taxol).html Results The proportion of metabolic syndrome (MS) was significantly higher in LP patients than the controls (29.5% vs. 9.8%, odds ratio [OR] 3.83; 95% confidence interval [CI] 1.40-10.50; P = 0.006). The proportion of dyslipidemia was also significantly higher in LP patients (70.